Quantum Rings Dressed by a High-Frequency Electromagnetic Field

Abstract

We demonstrate theoretically that the interaction of quantum rings with a high-frequency off-resonant electromagnetic field (dressing field) substantially renormalizes their electronic properties. Particularly, it is shown that a linearly polarized dressing field decreases the spin splitting arisen from the Rashba spin-orbit interaction, whereas a circularly polarized field splits electron states corresponding to mutually opposite directions of angular momentum. As a consequence, the dressing field can serve as an effective tool to control spin and transport characteristics of the quantum rings and be potentially exploited in optoelectronic applications.

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ACKNOWLEDGMENTS

The work was partially supported by RISE Program (project CoExAN), Russian Foundation for Basic Research (project no. 17-02-00053), Rannis project 163082-051, Ministry of Education and Science of the Russian Federation (projects 3.4573.2017/6.7, 3.2614.2017/4.6, 3.1365.2017/4.6, 3.8884.2017/8.9, 14.Y26.31.0015) and Government of the Russian Federation (grant 08-08).